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scsi: ufs: mediatek: TX skew fix

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Fix Mediatek TX skew issue by checking dts setting and vendor/model. Then
set PA_TACTIVATE to 8.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Acked-by: Chun-Hung Wu <Chun-Hung.Wu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20240315083448.7185-3-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang
2024-03-15 16:34:43 +08:00
committed by Martin K. Petersen
parent 1c5e7221bb
commit e7b3c64a2a
2 changed files with 22 additions and 0 deletions
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drivers/ufs/host/ufs-mediatek.c
+21
View File
@@ -118,6 +118,13 @@ static bool ufs_mtk_is_pmc_via_fastauto(struct ufs_hba *hba)
return !!(host->caps & UFS_MTK_CAP_PMC_VIA_FASTAUTO);
}
static bool ufs_mtk_is_tx_skew_fix(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
return (host->caps & UFS_MTK_CAP_TX_SKEW_FIX);
}
static bool ufs_mtk_is_allow_vccqx_lpm(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
@@ -629,6 +636,9 @@ static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
if (of_property_read_bool(np, "mediatek,ufs-pmc-via-fastauto"))
host->caps |= UFS_MTK_CAP_PMC_VIA_FASTAUTO;
if (of_property_read_bool(np, "mediatek,ufs-tx-skew-fix"))
host->caps |= UFS_MTK_CAP_TX_SKEW_FIX;
dev_info(hba->dev, "caps: 0x%x", host->caps);
}
@@ -1455,6 +1465,17 @@ static int ufs_mtk_apply_dev_quirks(struct ufs_hba *hba)
if (mid == UFS_VENDOR_SAMSUNG) {
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TACTIVATE), 6);
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HIBERN8TIME), 10);
} else if (mid == UFS_VENDOR_MICRON) {
/* Only for the host which have TX skew issue */
if (ufs_mtk_is_tx_skew_fix(hba) &&
(STR_PRFX_EQUAL("MT128GBCAV2U31", dev_info->model) ||
STR_PRFX_EQUAL("MT256GBCAV4U31", dev_info->model) ||
STR_PRFX_EQUAL("MT512GBCAV8U31", dev_info->model) ||
STR_PRFX_EQUAL("MT256GBEAX4U40", dev_info->model) ||
STR_PRFX_EQUAL("MT512GAYAX4U40", dev_info->model) ||
STR_PRFX_EQUAL("MT001TAYAX8U40", dev_info->model))) {
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TACTIVATE), 8);
}
}
/*
drivers/ufs/host/ufs-mediatek.h
+1
View File
@@ -142,6 +142,7 @@ enum ufs_mtk_host_caps {
*/
UFS_MTK_CAP_ALLOW_VCCQX_LPM = 1 << 5,
UFS_MTK_CAP_PMC_VIA_FASTAUTO = 1 << 6,
UFS_MTK_CAP_TX_SKEW_FIX = 1 << 7,
};
struct ufs_mtk_crypt_cfg {